/*
 * Flashlib - QB9 common Flash library
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */


package com.qb9.flashlib.easing 
{	
	internal class Bounce
	{		
		public static function easeIn(time:Number, start:Number = 0, change:Number = 1, duration:Number = 1):Number
		{
			if ((time /= duration) < (1 / 2.75))
			{
				return change * (7.5625 * time * time) + start;
			} else if (time < (2 / 2.75))
			{
				return change * (7.5625 * (time -= (1.5 / 2.75)) * time + .75) + start;
			} else if (time < (2.5 / 2.75))
			{
				return change * (7.5625 * (time -= (2.25 / 2.75)) * time + .9375) + start;
			}
			else
			{
				return change * (7.5625 * (time -= (2.625 / 2.75)) * time + .984375) + start;
			}
		}
		public static function easeOut(time:Number, start:Number = 0, change:Number = 1, duration:Number = 1):Number
		{
			return change - easeIn(duration - time, 0, change, duration) + start;
		}
		public static function easeInOut(time:Number, start:Number = 0, change:Number = 1, duration:Number = 1):Number
		{
			if (time < (duration / 2))
			{
				return easeIn((time * 2), 0, change, duration) * .5 + start;
			}
			else
			{
				return easeOut((time * 2) - duration, 0, change, duration) * .5 + change*.5 + start;
			}
		}
	}
}
